VaultPress - WordPress Backup and Security
VaultPress is a subscription-based protection, security and backup service for WordPress blogs and sites. Built on the same Automattic grid that serves over 32 million WordPress.com blogs and 330 million monthly visitors, VaultPress secures your site.

About encrypted backups in iTunes - Apple Support
iTunes doesn't encrypt your backups by default. To encrypt a backup in iTunes for the first time, turn on the password-protected Encrypt backup option. iTunes automatically makes encrypted backups for that device from then on.